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A kind of polymerized titanium salt modified chitosan flocculant, its preparation method and application

A flocculant and chitosan technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor treatment effect, poor stability, and complex components , to achieve the effect of good flocculation effect, fast reaction speed and fast sedimentation rate

Active Publication Date: 2019-05-03
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a flocculation-effective flocculant for the problems of complex composition, poor stability, and poor treatment effect of the non-polar-organic multi-element composite flocculant in the prior art. Polymerized titanium salt modified chitosan flocculant with the characteristics of good, fast reaction speed, fast sedimentation rate, high removal rate and wide pH application range and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of polymerized titanium salt modified chitosan flocculant, comprising the steps of:

[0030] 1) Mix titanium tetrachloride with 0.01mol / L sulfuric acid aqueous solution, and react for 60 minutes under the condition of 20W microwave power to obtain an acidic titanium salt solution, and cool the acidic titanium salt solution in an ice-water bath for 30 minutes; tetrachloride The mass volume ratio of titanium and strong acid aqueous solution is 0.01g: 0.1mL;

[0031] 2) Dilute the cooled acidic titanium salt solution in step 1) with water to 0.1 mol / L, add an alkali solution to the diluted acidic titanium salt solution, and react for 20 minutes at 20W ultrasonic power and 15°C; the alkali The solution is formed by mixing butyllithium, lithium diisopropylamide, sodium hydroxide, potassium hydroxide and water according to the mass volume ratio of 1 g:2 g:1 g:1 g:10 mL, wherein the butyl The mass ratio of base lithium to the acidic titanium salt in the a...

Embodiment 2

[0037] A preparation method of polymerized titanium salt modified chitosan flocculant, comprising the steps of:

[0038] 1) Mix titanium trichloride with 2mol / L sulfuric acid aqueous solution, and react for 120 minutes under the condition of microwave power of 1500W to obtain an acidic titanium salt solution, and cool the acidic titanium salt solution in an ice-water bath for 60 minutes; titanium trichloride The mass volume ratio with the strong acid aqueous solution is 50g: 1000mL;

[0039] 2) Dilute the cooled acidic titanium salt solution in step 1) with water to 30 mol / L, add an alkali solution to the diluted acidic titanium salt solution, and react for 60 minutes at 500W ultrasonic power and 100°C; the alkali The solution is formed by mixing butyllithium, lithium diisopropylamide, sodium hydroxide, potassium hydroxide and water according to the mass volume ratio of 1 g: 10 g: 2 g: 2 g: 1000 mL, wherein the butyl The mass ratio of base lithium to the acidic titanium salt ...

Embodiment 3

[0045] A preparation method of polymerized titanium salt modified chitosan flocculant, comprising the steps of:

[0046] 1) Mix titanium tetrachloride with 1mol / L sulfuric acid aqueous solution, and react for 100 minutes under the condition of 100W microwave power to obtain an acidic titanium salt solution, and cool the acidic titanium salt solution in an ice-water bath for 30 minutes; titanium tetrachloride The mass volume ratio with the strong acid aqueous solution is 10g: 200mL;

[0047] 2) Dilute the cooled acidic titanium salt solution in step 1) with water to 10mol / L, add an alkali solution to the diluted acidic titanium salt solution, and react for 40 minutes at 100W ultrasonic power and 30°C; the alkaline solution It is formed by mixing butyl lithium, lithium diisopropylamide, sodium hydroxide, potassium hydroxide and water according to the mass volume ratio of 1 g:5 g:3 g:3 g:400 mL, wherein the butyl The mass ratio of lithium to the acidic titanium salt in the acidi...

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Abstract

The invention discloses a polymerization titanium salt modified chitosan flocculating agent, and a preparation method and application thereof. The preparation method of the flocculating agent comprises the steps of mixing a titaniferous compound and a strong-acid water solution for reacting to obtain an acid titanium salt water solution, and cooling the acid titanium salt water solution; after diluting the cooled acid titanium salt water solution, adding organic alkali for reacting to adjust an alkalization degree of a reaction system; then adding zinc salt, aluminum salt, calcium salt or ferric salt for stirring and reacting; after stirring and reacting for 1 to 60min, adding an organic chitosan monomer, an olefin functional organic monomer and a stabilizer into a reaction solution, and continuously reacting for 1 to 3h; after finishing the reaction, curing for 1 to 48h under the water bath condition with the temperature being ranged from 20 DEG C to 60 DEG C, and obtaining the polymerization titanium salt modified chitosan flocculating agent. The flocculating agent can be used for removing slightly soluble organic matters in waste water. The yielding water subjected to the treatment of the flocculating agent provided by the invention completely meets the requirement of 'Hygienic Standard For Drinking Water', and the removal rate of the multiple slightly soluble organic matters reaches up to above 80 percent.

Description

technical field [0001] The invention relates to the field of coagulation treatment, in particular to a polymerized titanium salt modified chitosan flocculant, a preparation method and application thereof. Background technique [0002] The main treatment process of existing drinking water is coagulation-sedimentation-filtration-disinfection, and the performance of coagulant determines the quality of water treatment effect and the level of water treatment cost. Among the existing flocculants, inorganic flocculants have the advantages of low price and wide optimal dosing range, but have disadvantages such as weak adsorption and bridging ability and large dosage. The inorganic coagulants currently used mainly include aluminum-based coagulants and iron-based coagulants, but a single coagulant will show disadvantages in their respective water treatment applications, such as residual aluminum produced by aluminum-based coagulants It will cause neurotoxicity to humans, and the resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/30
CPCC02F1/52C02F1/5236C02F1/56C02F2101/30
Inventor 丁露孙永军肖雪峰孙文全吴慧芳刘翠云夏霆郭莉莎贾正阳万志远吴燕霞
Owner NANJING TECH UNIV
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